Ok, kernel needs the module dm-snapshot for snapshot support, but the modules is storage on a snapshoted-lv ...
you can't make a root_snapshot with centos?
Zitat von Axel Glienke axel@glienke.cc:
in journalctl i found: modprobe: FATAL: Module dm-snapshot not found ... Can't process LV root_snap: snapshot target support missing from kernel
Zitat von Tru Huynh tru@centos.org:
On Wed, Dec 02, 2015 at 08:53:39PM +0100, Axel Glienke wrote:
Creating snapshot:
[root@lvmtest ~]# lvcreate -L5G -s -n root_snap /dev/centos/root Reducing COW size 5,00 GiB down to maximum usable size 2,94 GiB. Logical volume "root_snap" created. [root@lvmtest ~]# lvs LV VG Attr LSize Pool Origin Data% Meta% Move Log Cpy%Sync Convert root centos owi-aos--- 2,93g root_snap centos swi-a-s--- 2,94g root 0,00 swap centos -wi-ao---- 1,00g
--- reboot ---
dracut shell (missing /dev/centos/root)
cat proc/cmdline: BOOT_IMAGE=/vmlinuz-3.10.0-229.20.1.el7.x86_64 root=/dev/mapper/centos_root ro rd.lvm.lv=centos/root rd.lvm.lv=centos/swap crashkernel=auto rhgb quiet LANG=de_DE.UTF-8 systemd.debug
shouldn't you have a new grub entry with: root=/dev/mapper/root_snap rd.lvm.lv=centos/root_snap
Tru
-- Tru Huynh http://pgp.mit.edu:11371/pks/lookup?op=get&search=0xBEFA581B
Grüße
Axel
CentOS mailing list CentOS@centos.org https://lists.centos.org/mailman/listinfo/centos
Grüße
Axel